A Class Of Reliable Control Approach For T-S Fuzzy Systems

With the progress of the times,people are increasingly aware of the huge impact of failures on industrial processes.Even though modern control performance is getting better and better,the resistance to external disturbances is also strong,but failures can never be avoided.In large and complex control systems,failures often cause some economic losses and even harm people's lives.Therefore,people need some reliability when designing control systems.What is the reliable control system,when the system is not at failure,to the safe and stable operation;when the system internal failure(failure sensor,actuator or other components),not only can guarantee the stable operation of the system,and achieve the performance demand index.The system that gives consideration to both of them is called a reliable control system.From the above introduction,it is known that the research on the problem of reliable control has the economic value and significant research significance.The main research system in this thesis is to develop a very mature T-S fuzzy system.The theory of robust control is commonly used in the use of reliable control design.In terms of performance requirements,combined with H? control theory and design of passive failure-tolerant controller,we use function method and design LMI technology to solve controller gain.The main contents are as follows:First of all,the object of this thesis is the T-S fuzzy system with uncertainty,and on this basis,the problem of reliable control is studied.The model of uncertain dynamic fuzzy system studied in this thesis is known,considering the condition of failure,a reliable state feedback controller is designed for continuous uncertain T-S fuzzy system,and the global asymptotic stability condition of fuzzy system based on uncertainty is obtained.Aiming at actuator failures,two effective reliable controller design methods are presented by using linear matrix inequality method,so that it can compensate for the adverse effects of failures and ensure the stable operation of the system.Secondly,the research object is T-S fuzzy model with time delay,and its passivity and dissipation are added to study its reliable control.For the passive control problem of the system,the existence condition and design method of the state feedback controller are given,so that under the operation of the controller,the original system exists and has the passivity of dissipation rate ? Then consider the Markov jump problem,based on state feedback controller design for a class of reliable passive controller,which can make the original system asymptotically stable,on the basis of this can make it passive performance needs.The effectiveness of the results is proved by a simulation example.Finally,the main research problems are summarized,and then the research issues that still need to be explored or supplemented are prospected.